Deploy the nginx-revproxy helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy the `nginx-revproxy` Helm chart on Linode Kubernetes Engine using Pulumi, we will be using the `@pulumi/kubernetes` package. This package allows us to interact with Kubernetes resources, including deploying Helm charts.

The process to deploy a Helm chart involves these steps:

1. Set up a Pulumi project and configure it to use the Linode provider.
2. Create a Kubernetes cluster on Linode Kubernetes Engine (LKE).
3. Deploy the `nginx-revproxy` Helm chart to the created Kubernetes cluster.

Below is a TypeScript program that performs these steps. I will describe the resources that are created and the role they play in the process:

- `kubernetes.Provider`: This is used to configure the Kubernetes provider to interact with the Linode Kubernetes cluster.
- `kubernetes.helm.v3.Chart`: This resource is used to deploy a Helm chart to a Kubernetes cluster. In our case, we'll use it to deploy `nginx-revproxy`.

Firstly, you need to install the necessary Pulumi packages by running:

```bash
npm install @pulumi/pulumi @pulumi/kubernetes @pulumi/linode
```

Here is the Pulumi TypeScript program that you could use to deploy the Helm chart:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as kubernetes from "@pulumi/kubernetes";
import * as linode from "@pulumi/linode";

// Create a Linode Kubernetes Engine (LKE) cluster where the Helm chart will be deployed.
const cluster = new linode.LkeCluster("nginx-revproxy-cluster", {
    label: "nginx-revproxy-cluster",
    k8sVersion: "1.21", // substitute with the latest supported version on LKE
    region: "us-central", // choose the most appropriate region
    pool: {
        count: 2,
        type: "g6-standard-1", // substitute with the required node type
    },
});

// Retrieve the kubeconfig for the created LKE cluster.
const kubeconfig = pulumi
    .all([cluster.id, cluster.kubeconfig])
    .apply(([_, kubeconfig]) => {
        return kubeconfig.rawConfig;
    });

// Create a Pulumi Kubernetes Provider that uses the kubeconfig.
const k8sProvider = new kubernetes.Provider("k8s-provider", {
    kubeconfig: kubeconfig,
});

// Deploy the nginx-revproxy Helm chart.
const nginxRevproxyChart = new kubernetes.helm.v3.Chart(
    "nginx-revproxy",
    {
        chart: "nginx-revproxy",
        version: "latest", // use the appropriate chart version
        fetchOpts: {
            repo: "https://charts.bitnami.com/bitnami", // use the correct Helm repository that contains the nginx-revproxy chart
        },
    },
    { provider: k8sProvider }
);

// Export the kubeconfig and the Kubernetes cluster name to access it later.
export const outputKubeconfig = kubeconfig;
export const clusterName = cluster.label;
```

To run this program and create the resources:

1. Save the code in a file named `index.ts`.
2. Ensure you have the Pulumi CLI installed and configured to use your Linode account.
3. Run `pulumi up` in the directory where the `index.ts` file is located to execute the code and create the resources.

Remember to replace the placeholder values like the Kubernetes version, region, and node types with appropriate values for your environment.

The above program will create a new Kubernetes cluster on Linode and deploy the `nginx-revproxy` Helm chart into this cluster. It also exports the kubeconfig, which you can use to interact with your cluster using `kubectl` or other Kubernetes tools.